How to Calculate Meal Prep Cost for a Week
Meal prepping saves time, but does it actually save money? The answer is almost always yes — but only if you know what you're spending. Most people who meal prep have a rough sense of their grocery bill but no idea what each meal actually costs. Here's how to calculate it precisely, and what to do with that number.
Why Calculating Meal Prep Cost Matters
Without knowing your cost per meal, you can't compare home cooking to takeout, spot where your budget is going, or make intentional trade-offs between ingredients. A $90 grocery run that produces 15 meals costs $6 per meal — competitive with fast food. The same $90 spent on 10 meals costs $9 each — a different picture entirely.
The goal of calculating meal prep cost isn't to obsess over every penny. It's to understand your baseline so you can make decisions from a position of knowledge rather than guessing.
Step 1: List Every Meal You're Prepping
Start with a clear picture of what you're making for the week. Write down every meal — breakfasts, lunches, dinners, and snacks if you're prepping those too. Note the number of servings each recipe makes.
Example weekly prep:
- Overnight oats × 5 servings (breakfast)
- Grilled chicken and rice × 5 servings (lunch)
- Pasta with turkey meat sauce × 4 servings (dinner)
- Roasted vegetables × 4 servings (dinner side)
Total: 18 servings for the week.
Step 2: Track Every Ingredient and Its Cost
For each recipe, list every ingredient and calculate the cost of the amount used — not the cost of the whole package. This is where most people skip out, but it's the step that makes the calculation accurate.
The formula for each ingredient:
Cost used = (amount used ÷ total package amount) × package price
Example: You use 300g of chicken breast from a 1kg pack that cost $8.00.
300g ÷ 1000g × $8.00 = $2.40
Step 3: Add Up Each Recipe's Total Cost
Sum up all ingredient costs for each recipe to get the total recipe cost. Then divide by the number of servings to get cost per serving.
Cost per serving = total recipe cost ÷ number of servings
Example: Grilled Chicken and Rice (5 servings)
| Ingredient | Amount Used | Cost |
|---|---|---|
| Chicken breast | 750g | $6.00 |
| White rice (dry) | 500g | $0.90 |
| Olive oil | 2 tbsp | $0.30 |
| Seasoning | — | $0.20 |
| Total | $7.40 |
$7.40 ÷ 5 servings = $1.48 per serving
Step 4: Calculate Total Weekly Cost and Average Cost Per Meal
Add up the total cost across all your recipes to get your weekly meal prep spend. Divide by the total number of servings to get your average cost per meal for the week.
Continuing the example above — if all four meal preps combined cost $45 and produce 18 servings:
$45 ÷ 18 servings = $2.50 average cost per meal
What's a Good Cost Per Meal for Meal Prep?
For home meal prep, these are reasonable benchmarks:
- Under $2.50 per meal — excellent, budget-conscious prep
- $2.50–$5.00 per meal — solid average, competitive with most takeout
- $5.00–$8.00 per meal — on the higher end, check your protein costs
- Over $8.00 per meal — worth reviewing — you may be over-buying or using expensive proteins
Where Most Meal Prep Cost Goes
In most meal prep plans, protein accounts for 50–70% of the total ingredient cost. If you want to reduce your per-meal cost, this is almost always where to start. A few adjustments that consistently work:
- Switch to cheaper protein cuts. Chicken thighs cost 30–50% less than breasts and are harder to overcook. Ground turkey is cheaper than ground beef with similar protein content.
- Add a legume-based meal. One lentil or bean meal per week can cut your weekly protein cost by 15–25%.
- Buy proteins in bulk and freeze. Per-pound cost drops significantly for most proteins when bought in larger packs.
- Use eggs. Eggs are one of the cheapest complete proteins available. A breakfast prep built around eggs costs a fraction of one built around meat.
Using a Calculator to Speed This Up
Doing this by hand for each ingredient is tedious but only needs to happen once per recipe. After that, you have a reliable cost baseline you can reuse and update when prices change. Our Meal Cost Calculator lets you enter each ingredient with its package price and percentage used, and handles the math automatically.
Frequently Asked Questions
How much does the average person spend on meal prep per week?
For one person, a week of meal prep typically costs $30–60 in ingredients, depending on protein choices and how many meals per day are prepped. For a couple, $50–90 is a typical range for full-week prep.
Is meal prepping actually cheaper than buying food?
Almost always yes. A home-cooked meal prepped in bulk typically costs $2–5 per serving. The equivalent takeout or restaurant meal typically costs $10–20. Even accounting for time, the savings are significant over a week or month.
Should I include pantry staples like oil and spices in my calculation?
For a rough estimate, no — these add $0.10–0.30 per meal at most. For a precise budget, yes — use the portion-cost formula above and include them. The difference matters when you're tracking across many meals.
Frequently Asked Questions
How much should a week of meal prep cost for one person?
A realistic weekly meal prep budget for one person covering all lunches and dinners is $40–60. This works out to $2–4 per meal. Breakfasts add roughly $15–20 more. The biggest variable is protein — switching from chicken breast to thighs, or incorporating one or two plant-based protein meals, can reduce the weekly total by $10–15.
Is it cheaper to meal prep or buy frozen meals?
Meal prepping from scratch is almost always cheaper. A frozen meal typically costs $4–8 per serving. A comparable home-prepped meal costs $2–4 per serving using similar ingredients. Over a week of lunches, that's a difference of $10–20. The trade-off is time — frozen meals require zero prep; meal prepping requires 2–3 hours on the weekend.
How do I track the cost of pantry staples I already own?
Use the current replacement cost, not what you originally paid. If you need to buy a new bottle of olive oil this week for $10, that cost belongs in this week's budget. Alternatively, estimate the cost per use: a $10 bottle that lasts 3 months of cooking represents about $0.80 per week. For most pantry staples, this level of tracking is optional — focus on the high-cost ingredients (proteins, produce) for 90% of the accuracy.